20464003 has 8 divisors (see below), whose sum is σ = 23442272. Its totient is φ = 17499456.

The previous prime is 20463979. The next prime is 20464009. The reversal of 20464003 is 30046402.

20464003 is a nontrivial binomial coefficient, being equal to C(6398, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20464003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20464009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 6397.

It is an arithmetic number, because the mean of its divisors is an integer number (2930284).

Almost surely, 2^20464003 is an apocalyptic number.

20464003 is the 6397-th triangular number and also the 3199-th hexagonal number.

20464003 is the 2133-rd centered nonagonal number.

20464003 is a deficient number, since it is larger than the sum of its proper divisors (2978269).

20464003 is an equidigital number, since it uses as much as digits as its factorization.

20464003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20464003 is about 4523.7156188249. The cubic root of 20464003 is about 273.5248972742.

The spelling of 20464003 in words is "twenty million, four hundred sixty-four thousand, three".